FIELD: electrochemical industry. SUBSTANCE: purification of amino acids is exercised in electrodialyzer, that has cation-exchanging, anion-exchanging and bipolar membranes, that form running-through chambers of demineralization, non-running through alkaline chambers, non-running through acid chambers. Electrodialyzer has additional cation-exchanging membranes, that form with anion-exchanging membranes non-running through chambers of concentration, with bipolar membranes - running through chambers of lixiviation and also additional aniono-exchanging membranes, that form with bipolar membranes running through chambers of oxidization and with cation-exchanging membranes non-running through chambers of concentration. EFFECT: increased productivity of amino acids purification. 2 dwg, 1 tbl
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